Show Some Backbone, Have / Grow A Spine, Breathing Down Someone's Neck, Front Runner Status
The backbone is really just another word for spine. The form of this idiom is to "show" or "demonstrate" some backbone, meaning, to demonstrate to others that you are not a chicken (coward), but rather, a brave and vigorous person.
This version is considered less crude, and thus, is more often applied to the political arena in written English.
Example: "Activists expected the Obama Administration to show some backbone in dealing with Republican opposition, but many have been sorely disappointed in the administration's behavior."
This is not to pick sides; I am simply delivering context for the post that will follow this one. Stay tuned.
Have / Grow A Spine
The spine is the set of bones that is the body's pillar of support. The human body's muscles use the spine as the foundation for all firm, aggressive motion. Therefore, having a spine has become idiomatic for behaving in a courageous or vigorous manner, the opposite of behaving like a "chicken" (a coward).
To grow a spine is to begin behaving in a courageous or vigorous manner, while having a spine is to continue to behave in such a manner.
Example: "Don't tell me you can't get rid of one little spider! Grow a spine! How old are you?!"
Breathing Down Someone's Neck
In politics, as in horse races, to be breathing down someone's neck is to be very close behind that person in a race.
Example: "But it was a surprise. Only one week after his upset victory over Rick Lazio in the Republican primary, Paladino is now breathing down Cuomo’s neck.
Only six points separate Cuomo and Paladino in the Quinnipiac University poll. Cuomo now leads 49-43, with a plus or minus error of 3.6."
(Source: CBSNewYork)
Front Runner Status
One of a variety of "horse race" political idioms, front runner status means the state of being in the lead.
The "race" is the campaign for political office.
Example: "Wednesday was supposed to be Cuomo’s day as he picked up the endorsement of New York City’s notoriously independent mayor, Michael Bloomberg, in the race for governor.
But a new poll changed that because it turned Cuomo’s once comfortable front-runner status on its head. ...Only six points separate Cuomo and Paladino in the Quinnipiac University poll. Cuomo now leads 49-43, with a plus or minus error of 3.6."
➤ Read more idioms and phrases, English grammar and vocabulary at Basic English Grammar And Vocabulary .
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100 Articles on Idioms and Phrases
We Have A Situation, Picking Up Some Chinese (Food)
Origin: Phrases Derived from Various Sources, Part 1
Getting Warmer, The Suffix, -ish, Coming To A Head, Hitting the Books
What's Your Beef, Not Quite So Simple
A Lame Duck, lame duck session
Pain At The Pump, Slogging One's Way, Being Outdoors
A Number Of Something, A Product Line, To Kill A Product Line
A Big Freeze,To Be In, Or Not In, Arm-Twisting
Last-Minute, Propelled By, Squeaking By
Blowing A Gasket, Lost In Translation
Nothing To Lose, It Can't Hurt, A Babe In The Woods
Neck Of The Woods, Turning The Other Cheek, A Loudmouth
An Odyssey, Getting One's Feet Wet
Significant Other, Having Something To Say
Through and Through, A Crying Shame
Tell Us How You Really Feel, Barking Up The Wrong Tree
Begging On Hands And Knees, The Front Burner & The Back Burner
Wilderness and Errand Themed Idioms, In The Wilderness
Surging and Ebbing, Playing Your Cards Right
Positive and Negative Advertisements, Enthusiasm Gap
Through The Barrel Of A Gun, Man Up,
A Case For Action, Darkening, Brightening, Salvaging Victory
Political Battlegrounds, Pumping Money, A Wave Of Ads, Ramping Up Spending
English Proverbs With Their Meanings
Smooth Sailing, Rough Sailing, Sailing To Victory, Going Solar, Zombie Banks
Taking The Temperature (of a group), Buck Up
Show Some Backbone, Have / Grow A Spine, Breathing Down Someone's Neck, Front Runner Status
Staring Down The Barrel Of...., In Line (To Succeed), Up For Grabs, Band-Aid Solution
A Blip, A Wave, A Tsunami/ A Tidal Wave, A Method To One's Madness, Crowning Achievement
Easier Said Than Done, In Store, Jumping The Shark, Heading Downhill
In All Seriousness, Digging It, Giving A Damn, A.M. and P.M., Keep Up The Good Work
To Keep Something Coming, Make My Day, Forcing Something, Turning The Page
Mission Accomplished, I Can't Thank You Enough, Words Fail Me, At A Loss For Words
"I Can't Hear You!", To Snatch Away, At The Top Of Your Lungs, Hanging Your Head (In Shame)
https://idiomscollect.blogspot.com/2017/04/i-cant-hear-you-to-snatch-away-at-top.html
Leaving It All On The Field, Cool, Hot, To Trust Blindly, I'm Free
The Day of Reckoning, Aiming For Something, Hopping Mad, You've Gotta Be Kidding Me
Throwing The Baby Out With The Bathwater, Off The Reservation, At First Blush
Smelling A Rat, A Packrat, A Frog In Your Throat
When Pigs Fly, Horsing Around, An Eager Beaver, Dropping Like Flies
Wolfing Food Down, Pigging Out, Opening A Can Of Worms
A White Elephant, The Tip of the Iceberg
Letting The Cat Out Of The Bag, A Fat Cat
Making Waves, Go With The Flow, Down to Earth
A Stick-In-The-Mud, A Sight For Sore Eyes, Raining On Someone's Parade
Under the Weather, Having Your Head In The Clouds
Stealing Someone's Thunder, Hitting the Sack, Hitting the Hay, Digging Deep, Cheesy
A Bad Apple, A Bad Egg, One's Bread and Butter, A Piece of Cake
In A Nutshell, Egg on your Face, A Hot Potato, Hitting the Sauce, Gravy Train etc.
Riding Someone's Coattails, Caught On Tape, Armed to the Teeth, Seeing Eye To Eye
Flipped On Its Head, In The Heart Of, I Feel Like A Million Bucks, On The Line
Notable English Idioms: Part 01
Notable English Idioms: Part 02
Idioms beginning with E, F, G, H
Idioms beginning with I, J, K, L
Idioms beginning with P, Q, R, S
Idioms beginning with T, U, V, W, X, Y, Z